Soot blower for boilers



June 23, 1931. 1 C, BENNETT 1,811,346

SOOT BLOWER FOR BOILERS Filed Dec. 17, 1924 2 Sheets-Sheet l June 23, 1931. J, C, BENNETT I 1,811,346

SOOT BLOWER FOR BOILERS Filed DeG- 17, 1924 2 sheets-sheet 2 31a/vento@ Patented June 23, 1931 PATENT oFF-ICE l JAMES C. BENNETT, OF DETROIT, MICHIGAN SCOT BLOWER FOR BOILERS Application filed December 17, 1924. Serial No. 756,452.

This inventionrelatesto soot 'blowers for boilers of Vthat type utilizing steam as an ,agent for removing soot, incrustations and foreign .matter from the exterior surfaces of boiler tubes, to increase the ,eliiciency of the boiler as a steam generating apparatus.

@ne of the objects of the invention is to provide a device `of this character wherein a rotary blower arm when turned in one direc- ...10 tion causes opening of a steam supply valve,

and when turned in the opposite direction causes the closing of said valve. VAnother objecto'f this invention is to fur- '.nish a rotary blower arm with a steam con- 15 trol valve and means for opening and closing lthe .valve during partial rotation of the blower arm.

A further object of this invention is to furnish ablower arm with steam supply con 'zofnections or vfittings that will permit of the arm receiving steamduring a rocking move ment of 'the arm,and provision is made for regulating the degree of arm rocking so that steam ejected from the arm may be directed a-towa`rds adjacent 'boiler tubes.

A still further object of this invention is to provide a sootblowing apparatus wherein a fblower arm and steam lconnections or lit- Atings are supported in a manner, as to be 30 hereinafter described, that precludes stresses and strains on the connections that might -cause leakage of steam during the operation of the apparatus. l

'The above and other objects are attained kby a durable and inexpensive structure that will be hereinafter specifically described and rthenclaimed, and reference will nowbe had -tothe drawings, wherein f-Figure 1A is a longitudinal sectional view `.1.1.0 of .a A.soot v'blowing apparatus in 'accordance with this invention;

Fig..2 is a cross sectional view taken on the line II-Il, Fig. 1; Y

Fig. 3 is asimilar view taken on the line Fig. 4 is a plan of the soot blowing appa- 4ratus partly in section v 'Fi I5 is a cross sectional view taken on 4the'ilme V-.-V o Fig. 1;

-Fig. 6 is a longitudinal sectional lView of r,couplingmember L14 to which is connected, as

a steam valve adapted to form part of the apparatus, andv Fig. is across sectional View taken on the line VII-VII of Fig. 1.

Inthe drawings the reference numeral 1 denotes a boiler setting, wall or other support that isin proximity to boiler tubes 2 adapted to have vsoot and incrustations removed therefrom by steam or a like agent forcibly .projected against or towards the tubes.

Mounted in the setting 1 is a tubular member 3having diagrammatically opposed ears l to which are connected, by nut equipped bolts 5 the upstanding ears 6 of a horizontally disposed yoke shaped support 7, which has opposed ends provided with sleeve connections 8 and 9.

lnthese sleeve connections are mounted the lateral connections 10 and 11 of a valve body 70 12, and connected to the connections 9 and 10 is a steam supply pipe 13. Extending through the connection y8 and attached to the valve 4body connection 11 is asteam outlet 5 at 15, a goose neck 16 of a stuffing box 17 located above the valve body 12, said stuffing box and itsgoose neck cooperating` with the outletcoupling member 14E in forming a steam connection or litting.

Thestuling box 17 hasa conventional form of gland 18 and ypacking` 19 lfor the inner end of a `blower arm 2() which extends through the .tubular member 3 into proximity to the tubes '2. The `blower arm is preferably in the form of a pipe or conduit provided with a plurality of steam discharging nozzles 21, of the internal type, said nozzles being arranged so that the outer end of the blower arm constitutes a large nozzle for distributing and directing steam towards and against the tubes 2.

The blower arm 20 is rotatable in the stuffing box 17 and a closure 22 loosely fitted on theblower arm against the tubular member 3. fFixed on the blower arm 2O against the closure 22 isthe hub portion 23 of a large sprocket wheel 24, and mounted on the hub 23isacoiled expansion spring 25 having one convolution ylixed in the hub 23 and another 59, through into the steam connection'or fitting l and intothe blower arm 20. yThe subsequent convolution bearing againstv the'closure 22 to hold it against the end of the tubular member 3 to close said member.

Suitably attached to the sprocket wheel 24, preferably by nut equipped bolts 26, is

a sector gear or rack 27 meshing with a sector gear or pinion 28 mounted on a'valve stem 29. VThis valve stem extends through a stulng box or bonnet 30 of the valve body l2 and is provided with a one-way conical plug 3l within the valve'body l2. The plug 31 controls the passage of steam lthrough the valve and said plug is properly adjusted within the valve body 12 and under the in` fluence of the expansible force of a spring 32 to prevent the plug from sticking in the valve body; there being rotation of the valve plug withoutleakageof steam and without any danger of thev valve becominginoperative because of expansion of valve parts incident vto steam passing through the valve.

direction, considering Fig. 5 or ina counter- Connected to the support 7 isa U-shaped bracket `33 having an end thereof provided with a bearing 34 for the valve stein 29. On

the'bracket 33, at that sideof the sprocketl wheel 24 opposite the sector gear or pinion 2S is a stop member or abutment 35 adapted to be engaged by stop pins 36 and 37 ad- Ajustably connected to the sprocket wheel 24,

clockwise direction considering Fig. l. Such rotation of the sprocket wheel moves the pin 36 away from the abutment 35 and the rotation may be continued yuntil the pin 37 engages theabutment 35. Initial rotation 'of )the sprocket wheel 24' causes the sector gear 27 to'rotate'the sector gear or rack 28 and open the valve so thatsteam may pass thererotation ofthe sprocket wheel 24 carries the sector gear 27 out of engagement with the f pinion 28 and the lsector gear 27 is carried around lby thesprocket wheel 24 until such @time as the pin 37 engages the abutment 35.

On lreversal of the sprocket wheel the sector gear 527 is-again brought into mesh'with the pinion 28 in the position where it was last released, or open position, to close the valve. It will thereforebe seen that during partial rotation of the blower arm 20 the steam supply valveis opened and thatreverse movement closes the valve, the closing being completed when the pin 36 engages the abutment 35.

`The valve plug 31 is adapted to be oscillated for turning ofi1 and on the valve, but the oscillation of the valve plug is intermittent relative to a complete oscillation of the sprocket wheel, and it is by virtue of the adjustable pins 36 and 37 that the degree of oscillation imparted to the blowerarm may be regulated so thatthe blower arm will discharge steam in desired directions according to the location ofl the boiler tubes 2. l f

The automaticcontrol of the steam supply valve, during oscillation of the blower arm, obviat'es manual control of such a'valve, and while I have herein shown a two-way plug valve, it is to be noted that this valve differs 'in construction from an ordinary valve of such type for the reason that the plug and valve body. are devoid of stops, because the stops are associated with other elements of my device. It is to be understood that other .y

steam to said arm, a valve in said means, ap..

gear segment movable with said arm, a pinion carried by said valve and engageable by said segment, means for turning said arm alternately in opposite directions, said gear segv ment being arranged to open the valve in onev` direction vofturning and to close the valve in the other 'direction of turning, and Vbiterminal stop means lfor said arm andV gear operative on disengagement ofv said gear from said ing.

2. In asoot blower, a-rotary blower arm having a lateral outlet, means for supplying steam to said arm, a valve in said means, a

gear segmentl movable with saidarm, a pinion.

carried by said valve and engageable by said segment, means for turning saidarmalternately in oppositel directions, said gearsegment `being arranged to open the valve in Aone direction of turning and to close' the valve in the other direction oi turning, aiXed stop abutment, and a: carrier member rotatable with said arm, stop pins carried bysaid memf ber and engageablerespectively'with opposite :sides ofV said abutmentfto limit the'turning f ino-vement of said arm in both directions, said pins beinglocated to engage said abutment on disengagement or said gear from said pinion in either direction of turning.V

3. lna soot blower, a rotary blower arm' having a lateral outlet, means for supplying pinion in either direction of turn ioo ternately in opposite directions, said gear segment being arranged to open the valve in one direction of turning and to close the valve in the other direction of turning, a fixed stop abutment, and a carrier member rotatable `With said arm, stop pins carried by said member and engageable respectively with opposite sides of said abutment to limit the turning movement of said arm in both directions, said pins being located to engage said abutment on disengagement of said gear from said pinion in either direction of turning, said pins being adjustable on said carrier member circularly around said arm,

In testimony whereof I afIiX my signature.

JAMES C. BENNETT. 

